LiveView itself will probably never support client-only directly.
However, there are two developments in this space which might open up interesting possibilities in the future:
- elixir_script which compiles (currently a subset of) Elixir code to JavaScript. With this, someone could make a library that accepts the same syntax as LiveView-behaviour modules but which would compile down to JavaScript and thus be fully client-side.
- lumen, an alternative BEAM (the Elixir/Erlang VM) implementation which could conceivably compile through WebAssembly to run fully in the browser.
